Casey rejoined the Rapids, where he won the 2010 MLS Cup, as assistant in January 2017. Anthony Hudson, the eighth Rapids head coach in franchise history, was fired after going 8-26-9 in MLS play since taking over the job in November 2017.
The New Hampshire native came to the Union via the MLS Re-Entry Draft in 2012 and had a successful three-season stint with 21 goals and 8 assists in 70 appearances. He ended his career with the Columbus Crew in the 2016 and was inexplicably sent off for a terrible straight red in his last appearance in Chester as a substitute.
Casey is the fourth former Union player to become a head coach, joining Chicago Fire head coach Veljko Paunović, Portmore United FC manager Shavar Thomas and Racing Club manager Eduardo Coudet.